<template>
<el-container>
  <!--头部区域-->
  <el-header>
    <div>
      <img class="handimg" src="../../assets/logo.png" alt="">
      <span>电商后台管理系统</span>
    </div>
    <el-button type="info" @click="logout">退出</el-button>
  </el-header>
  <!--页面主题区域-->
  <el-container>
    <!--侧边栏-->
    <el-aside :width="isCollapse ? '64px': '200px'">
      <div class="toggle-button" @click="toggleCoapse">|||</div>
      <!--侧边栏区域 unique-opened只能打开一个
      router 是开启路由模式
      根据:index的值来觉得路由值-->
      <el-menu :default-active="activePath" router :collapse="isCollapse" :collapse-transition="false" unique-opened background-color="#333744" text-color="#fff" active-text-color="#409FFF">
        <!--一级菜单-->
        <el-submenu :index="item.id + ''" v-for="item in menulist" :key="item.id">
          <!--一级菜单模板-->
          <template slot="title">
            <!--图标-->
            <i :class="iconObj[item.id]"></i>
            <!--文本-->
            <span>{{item.authName}}</span>
          </template>

          <!--二级菜单-->
          <el-menu-item @click="saveNavStae('/'+subItem.path)" :index="'/'+subItem.path" v-for="subItem in item.children" :key="subItem.id">
            <!--二级菜单模板-->
            <template slot="title">
              <!--图标-->
              <i class="el-icon-menu"></i>
              <!--文本-->
              <span>{{subItem.authName}}</span>
            </template>
          </el-menu-item>
        </el-submenu>
      </el-menu>
    </el-aside>
    <!--右侧内容主体-->
    <el-main>
      <!--路由站位符-->
      <router-view></router-view>
    </el-main>
  </el-container>
</el-container>
</template>

<script>
export default {
  name: "Home",
  data() {
    return {
      //左侧菜单数据
      menulist: [],
      //一级图标数据
      iconObj: {
        '125': 'iconfont icon-users',
        '103': 'iconfont icon-tijikongjian',
        '101': 'iconfont icon-shangpin',
        '102': 'iconfont icon-danju',
        '145': 'iconfont icon-baobiao'
      },
      isCollapse: false,
      //激活的链接地址
      activePath: ''
    }
  },
  methods: {
    logout() {
      window.sessionStorage.clear();
      this.$router.push("/login");
    },
    //获取所有菜单
    getMenuList() {
      this.$http.get('menus').then(res => {
        if (res.data.meta.status !== 200) return this.$message.error(res.meta.msg)
        this.menulist = res.data.data
      })
    },
    //点击按钮切换菜单折叠展开
    toggleCoapse() {
      this.isCollapse = !this.isCollapse
    },
    saveNavStae(activePath) {
      //保存链接的激活状态
      window.sessionStorage.setItem('activePath', activePath)
      this.activePath = activePath
    }
  },
  created() {
    this.getMenuList()
    this.activePath = window.sessionStorage.getItem('activePath')
  },

};
</script>

<style lang="less" scoped>
.el-container {

  height: 100%;
}

.el-header {
  background-color: #373C41;
  display: flex;
  justify-content: space-between;
  padding-left: 0;
  align-items: center;
  color: #ffff;
  font-size: 20px;

  >div {
    display: flex;
    align-items: center;

    span {
      margin-left: 13px;
    }
  }
}

.handimg {
  margin-left: 10px;
  width: 15%;
}

.el-aside {
  background-color: #323744;

  .el-menu {
    border-right: none;
  }
}

.el-main {
  background-color: #EAEDF2;
}

.iconfont {
  margin-right: 10px;
}

.toggle-button {
  background-color: #485164;
  font-size: 10px;
  line-height: 24px;
  color: #fff;
  text-align: center;
  letter-spacing: 0.2em; //字体间距
  cursor: pointer; //鼠标放上显示小手
}
</style>
